Completely surreal, this former German DAG explosives factory hidden in the Bydgoszcz Forest looks like an extremely sinister hobbit village, with small, moss-covered buildings spread over an area of 23km² (the building in the picture up top is one of the few large ones). In 2011, eight factory buildings - apparently just 1% of the entire complex! - were turned into a state-of-the-art museum detailing the history of dynamite and nitroglycerin, the tales of DAG, and the realities faced by 10,000 forced labourers who toiled here during the war. Exhibits are unfortunately in Polish only, but international visitors are assigned to an English-speaking guide who converts the written to the spoken.

To get here, take bus 56 from 'Nowy Rynek' to 'Glinki', then 68E from 'Glinki' to 'Park Przemysłowy / Exploseum', then follow the signs; or use bydgoszcz.jakdojade.pl for the most up-to-date bus schedules.